The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2011
Filed:
Aug. 31, 2006
Raymond Ashton Cutler, Bountiful, UT (US);
Roger Marc Flinders, Taylorsville, UT (US);
Darin Ray, Centerville, UT (US);
Raymond Ashton Cutler, Bountiful, UT (US);
Roger Marc Flinders, Taylorsville, UT (US);
Darin Ray, Centerville, UT (US);
Ceramatec, Inc., SLC, UT (US);
Abstract
Pressureless sintering of silicon carbide with fracture toughness in excess of about 4 MPa-mas measured by the single-edge precracked beam (SEPB) technique while maintaining a density greater than 3.1 g/cc for compositions with SiC greater than about 94 wt. % is made possible through the use of metallic Al to promote sintering and grain growth. Boron and carbon may be used as traditional sintering aids, with nitrogen to suppress grain growth, and additions of yttrium and/or lanthanide elements to promote intergranular fracture.